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Added some commentary about PNG_EXPORT in png.h and pngconf.h
This commit is contained in:
Glenn Randers-Pehrson
2010-12-06 08:54:55 -06:00
parent d546f4399f
commit a451725242
4 changed files with 30 additions and 11 deletions
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6
pngconf.h
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@@ -69,7 +69,8 @@
* below) but still have compiler specific implementations, others
* may be changed on a per-file basis when compiling against libpng.
*/
/* This macro protects us against machines that don't have function
/* The PNGARG macro protects us against machines that don't have function
* prototypes (ie K&R style headers). If your compiler does not handle
* function prototypes, define this macro and use the included ansi2knr.
* I've always been able to use _NO_PROTO as the indicator, but you may
@@ -306,7 +307,8 @@
#ifndef PNG_EXPORT
/* The ordinal value is only relevant when preprocessing png.h for symbol
* table entries.
* table entries, so we discard it here. See the .dfn files in the
* scripts directory.
*/
# define PNG_EXPORT(type, name, args, attributes, ordinal)\
extern PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args),\